The Yamaha YBR 125 is a light motorcycle made by Yamaha that succeeds its previous model for this segment, the Yamaha SR125. Introduced in 2005, it comes in naked, faired and 'custom' variants. It has a single-cylinder, air-cooled, four-stroke engine, displacing 124 cc (7.6 cu in). Model years up to 2007 use a carburetor system, with 2008 and on models using a fuel injection system.